Influence of Gb3 glycosphingolipids differing in their fatty acid chain on the phase behaviour of solid supported membranes: chemical syntheses and impact of Shiga toxin binding
Total Synthesis of Marine Glycosphingolipid Vesparioside B
作者:Peng-Cheng Gao、San-Yong Zhu、Hui Cao、Jin-Song Yang
DOI:10.1021/jacs.5b12589
日期:2016.2.10
The first total synthesis of a major component of marine glycolipid vesparioside B ( Scheme 1 , 1, R1 = n-C22H45, R2 = n-C14H29) has been accomplished through a convergent [4 + 3] coupling strategy. Key steps included stereoselective installment of a set of challenging 1,2-cis-glycoside bonds. A 2-quinolinecarbonyl-assisted α-galactosylation and a novel β-arabinosylation were developed, respectively
A neuritegenic ganglioside from sea cucumber, HLG‐2 (see figure), has been synthesized for the first time. The unique tandem of sialic acids, Neu5Gc‐α(2,4)‐NeuAc, was established by the combination of a reactive N‐Troc sialyl donor and a 1,5‐lactamized sialyl acceptor. The ceramide counterpart was assembled in a stereoselective manner. Direct connection of the trisaccharide and the ceramide successfully
The firsttotalsynthesis of neuritogenic gangliosideGAA-7 was achieved using the glucosyl ceramide (Glc-Cer) cassette approach. The stereocenter triad within the ceramide moiety of the target molecule was efficiently established from Dlyxose. The assembly of the ceramide moiety was followed by glycosylation with glucosyl donors to give Glc-Cer cassettes, which underwent conjugation with the oligosaccha
The first totalsynthesis of terpioside B (1 ) has been accomplished. Key steps include the stereoselective installments of a set of challenging 1,2‐cis‐glycosidic linkages. Thus, α(1,4)‐linked d ‐galactoside was effectively constructed from a 1,2‐anhydrogalactose donor and an unprotected 1,6‐anhydrogalactose acceptor by using a boron‐mediated aglycon delivery (BMAD) method. In addition, α‐l ‐fucofuranosides
Perkin communications. Synthesis of chiral long-chain α-hydroxy acids from<scp>L</scp>-ascorbic acid. Useful components for the synthesis of cerebrosides
Nucleophilic ring opening of chiral epoxy diols, derived from L-ascorbic acid, with 2-lithio-1,3-dithianes allowed preparation of long-chain (R)- and (S)-alpha-hydroxy acids of high optical purity.